Three foreign soldiers and one civilian working with NATO's International Security Assistance Force (ISAF) were killed in two separate incidents in southern Afghanistan Saturday, the alliance said. "Two ISAF service members and a civilian working with ISAF died following an insurgent attack in southern Afghanistan today," ISAF said, without disclosing the soldiers' nationality, in keeping with NATO policy. "In a separate incident, also in southern Afghanistan, another ISAF service member died following an improvised explosive device (IED) attack," the statement, said referring to the Taliban insurgents' weapon of choice. The latest casualty brings the number of foreign soldiers killed in Afghanistan this year to 215, according to a foreign news agency tally based on the website. In 2009, the deadliest year since the United States led an invasion that overthrew the Taliban regime in late 2001, 520 foreign soldiers were killed.